Sold!
I have a pair of 18mm Macht Schnell Spacers for sale, only used for less than 2k miles. I had a stock 19" 220M wheels on an E90 M3 and it was a perfect fit.
They retail for $129+tax. No low ballers. Local sale and pick up only (Los Angeles).
PM me if interested.
Photos:
http://www.m3post.com/forums/showthread.php?t=752627